Gonnheimer electrical components, German Gonnheimer models, Gonnheimer prices

Gonnheimer electrical components are specifically designed to suppress high-frequency noise and spike interference on signal and power lines, and also have the ability to absorb electrostatic pulses. Ferrite beads are used to absorb ultra-high-frequency signals. For example, some RF circuits, PLL, oscillator circuits, and circuits containing ultra-high-frequency memory (DDR SDRAM, RAMBUS, etc.) all require ferrite beads at the power input. Inductors are energy-storage components used in LC oscillator circuits, mid-to-low frequency filter circuits, etc., with an application frequency range rarely exceeding 50MHZ. Ferrite beads have high resistivity and permeability, equivalent to a resistor and inductor in series, but both resistance and inductance vary with frequency.

Gonnheimer electrical component structure

A bipolar transistor consists of three differently doped semiconductor regions: the emitter region, the base region, and the collector region. In an NPN type transistor, these regions are N-type, P-type, and N-type semiconductors, respectively, while in a PNP type transistor, they are P-type, N-type, and P-type semiconductors, respectively. Each semiconductor region has a lead terminal, typically denoted by the letters E, B, and C for the emitter, base, and collector, respectively. The base is physically located between the emitter and the collector and is made of lightly doped, high-resistivity material. The collector surrounds the base region. Since the collector junction is reverse-biased, it is difficult for electrons to be injected from here into the base region, resulting in a common-base current gain of approximately 1, while the common-emitter current gain achieves a larger value. From the cross-sectional diagram of this typical NPN type bipolar transistor on the right, it can be seen that the area of the collector junction is larger than that of the emitter junction. Additionally, the emitter has a relatively high doping concentration. Under normal circumstances, the regions of a bipolar transistor are not symmetric in physical properties or geometric dimensions. Assuming the transistor connected in the circuit is in the forward active region, if the connections of the collector and emitter in the circuit are swapped, the transistor will leave the forward active region and enter the reverse active region. The internal structure of the transistor determines that it is suitable for operation in the forward active region, so the common-base and common-emitter current gains in the reverse active region are much smaller than when the transistor is in the forward active region. This functional asymmetry is fundamentally due to the different doping levels of the emitter and collector. Therefore, in an NPN type transistor, although both the collector and emitter are N-type doped, their electrical properties and functions are completely non-interchangeable. The emitter region has the highest doping concentration, followed by the collector region, and the base region has the lowest doping concentration. In addition, the physical dimensions of the three regions differ; the base region is very thin, and the collector area is larger than the emitter area. Due to this material structure of the bipolar transistor, a reverse bias can be provided for the collector junction, provided that this reverse bias is not excessive enough to damage the transistor. The purpose of heavy doping of the emitter is to increase the efficiency of electron injection from the emitter into the base region, thereby achieving the highest possible current gain. In the common-emitter configuration of a bipolar transistor, small changes in the voltage applied across the base and emitter terminals cause significant changes in the current between the emitter and collector. Utilizing this property, input current or voltage can be amplified. By treating the base of the bipolar transistor as the input terminal and the collector as the output terminal, this two-port network can be analyzed using Thevenin's theorem. Based on equivalent principles, the bipolar transistor can be viewed as a voltage-controlled current source or as a current-controlled voltage source. Furthermore, looking into the left side of the two-port network, the input impedance at the base is reduced to the base resistance, thus lowering the requirements for the load capacity of the preceding stage circuit.

Gonnheimer electrical component composition

Internal accessories of circuit breakers: Auxiliary contacts are mechanically linked to the opening and closing mechanism of the main circuit of the circuit breaker. They are mainly used to indicate the open/closed status of the circuit breaker. Connected to the control circuit of the circuit breaker, they control or interlock related electrical appliances through the opening and closing of the circuit breaker. Alarm contacts are used for accident alarms in circuit breakers. These contacts only operate after the circuit breaker trips and opens. They are mainly used when the load of the circuit breaker experiences faults such as overload, short circuit, or undervoltage, causing free tripping. The alarm contact switches from its normally open position to a closed position, connecting indicator lights, electric bells, buzzers, etc., in the auxiliary circuit to display or remind of the fault trip status of the circuit breaker. Since the probability of free tripping due to load faults is not high. Shunt release: A shunt release is a trip device excited by a voltage source, and its voltage is independent of the main circuit voltage. A shunt release is an accessory for remote opening operation. When the power supply voltage is any value between 70% and 110% of the rated control power supply voltage, the circuit breaker can reliably open. The shunt release operates in short-time duty mode, and the coil energization time generally should not exceed 9S, otherwise the coil will burn out. To prevent coil burnout in molded case circuit breakers, a micro switch is connected in series with the shunt release coil. When the shunt release attracts the armature, the micro switch changes from normally closed to normally open. Since the control circuit of the shunt release power supply is cut off, even if the button is manually pressed, the shunt coil will not be energized, thus avoiding coil damage. After the circuit breaker is reclosed, the micro switch returns to the normally closed position. Undervoltage release: An undervoltage release is a trip device that causes the circuit breaker to open with or without delay when its terminal voltage drops to a specified range. Under thermal conditions, it should ensure reliable closing of the circuit breaker. Therefore, when a certain voltage drop occurs in the power supply voltage of the protected circuit, it can automatically open the circuit breaker to cut off the power, protecting the load appliances or electrical equipment downstream from undervoltage damage. During use, the undervoltage release coil is connected to the power side of the circuit breaker. The circuit breaker can only be closed after the undervoltage release is energized.

Gonnheimer electrical component features

Mercury switches achieve switching on and off based on the movement of mercury encapsulated in a glass or metal housing. Therefore, compared to mechanical switches, mercury switches have many characteristics: (1) Can be used in harsh environmental conditions. Since mercury switches are sealed, the internal mercury is isolated from the outside environment, allowing them to be used in environments with oil, steam, dust, and corrosive gases. (2) Requires small external force for switching. Mercury is the only metal that remains liquid at room temperature. It has high surface tension and specific gravity. Only a slight external force is needed to tilt the mercury switch, causing the mercury to move and achieve switching. (3) Mercury has good conductivity, and the contact resistance between electrodes in mercury switches is generally very low. (4) The current allowed to pass through a mercury switch depends on the electrode material. (5) Since the switching of a mercury switch is determined by the gravity of the mercury, it can work reliably for long periods. (6) The electrode contacts are liquid contacts, producing no noise. (7) Since mercury can flow, as long as the acceleration exceeds the set value, the mercury switch can turn on or off, making it suitable for use as a vibration-sensitive element. (8) Small size, diverse forms, and fully sealed devices. (9) Simple structure and low price. (10) High quality, premium products, suitable for beginners.

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